lustre/kernel_patches/patches/block-Ensure-we-only-enable-integrity-metadata-for-reads-and-writes-rhel7.patch

   1 From e69f18f06b97ed29645d020500222bfcec2b42b2 Mon Sep 17 00:00:00 2001
   2 From: "Martin K. Petersen" <martin.petersen@oracle.com>
   3 Date: Tue, 8 Apr 2014 22:59:31 -0400
   4 Subject: [PATCH] block: Ensure we only enable integrity metadata for reads and
   5  writes
   6
   7 We'd occasionally attempt to generate protection information for flushes
   8 and other requests with a zero payload. Make sure we only attempt to
   9 enable integrity for reads and writes.
  10
  11 Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
  12 Signed-off-by: Jens Axboe <axboe@fb.com>
  13 ---
  14  fs/bio-integrity.c | 3 +++
  15  1 file changed, 3 insertions(+)
  16
  17 diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
  18 index b355b98dbf1b..1c2ce0c87711 100644
  19 --- a/fs/bio-integrity.c
  20 +++ b/fs/bio-integrity.c
  21 @@ -182,6 +182,9 @@ static int bdev_integrity_enabled(struct block_device *bdev, int rw)
  22   */
  23  int bio_integrity_enabled(struct bio *bio)
  24  {
  25 +       if (!bio_is_rw(bio))
  26 +               return 0;
  27 +
  28         /* Already protected? */
  29         if (bio_integrity(bio))
  30                 return 0;
  31 --
  32 2.26.1
  33